/*
 * Copyright 2013 Nicolas Morel
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.kie.j2cl.tools.xml.mapper.api.deser.collection;

import java.util.EnumSet;
import java.util.function.Function;
import org.kie.j2cl.tools.xml.mapper.api.XMLDeserializer;
import org.kie.j2cl.tools.xml.mapper.api.deser.EnumXMLDeserializer;

/**
 * Default {@link XMLDeserializer} implementation for {@link java.util.EnumSet}.
 *
 * @param <E> Type of the enumeration inside the {@link java.util.EnumSet}
 * @author Nicolas Morel
 * @version $Id: $
 */
public class EnumSetXMLDeserializer<E extends Enum<E>>
    extends BaseSetXMLDeserializer<EnumSet<E>, E> {

  /**
   * newInstance
   *
   * @param deserializer {@link EnumXMLDeserializer} used to deserialize the enums inside the {@link
   *     java.util.EnumSet}.
   * @return a new instance of {@link EnumSetXMLDeserializer}
   */
  public static <E extends Enum<E>> EnumSetXMLDeserializer<E> newInstance(
      Function<String, XMLDeserializer<E>> deserializer) {
    return new EnumSetXMLDeserializer<>(deserializer);
  }

  private final Class<E> enumClass;

  /**
   * @param deserializer {@link EnumXMLDeserializer} used to deserialize the enums inside the {@link
   *     EnumSet}.
   */
  private EnumSetXMLDeserializer(Function<String, XMLDeserializer<E>> deserializer) {
    super(deserializer);
    this.enumClass = ((EnumXMLDeserializer<E>) deserializer.apply(null)).getEnumClass();
  }

  /** {@inheritDoc} */
  @Override
  protected EnumSet<E> newCollection() {
    return EnumSet.noneOf(enumClass);
  }

  /** {@inheritDoc} */
  @Override
  protected boolean isNullValueAllowed() {
    return false;
  }
}
